中文摘要：

取水口处的泥沙淤积问题关系到取水工程能否安全运行,从水流、河势角度论证了取水口布置的合理性,并减少取水对航道及防洪影响的必要性。以长江九江湖口水道某电厂取水口为例,采用平面二维水沙数学模型研究了取水口附近局部流态、河床冲淤、取水工程处悬沙含量等的变化规律,并对附近河床近期变化进行了预测。计算条件采用丰、中、枯典型年和典型系列年水沙条件,系列年考虑三峡工程和上游水库调度的影响。通过分析计算结果,选择了较优取水口方案,并推荐了适宜的取水口标高。研究结果表明,同一河段取水工程处河床冲淤规律受来水来沙条件和取水工程位置处的局部地形的共同影响。

英文摘要：

The treatment of sediment deposition around the water intake project is the key to its smooth operation, so it is nec- essary to demonstrate the rationality of intake location in terms of flow pattern and river regime. The water intake of a power plant located at Hukou Waterway, Jiujiang reach of Yangtze River, is taken as an example, a 2D flow and sediment model is used to simulate the flow pattern, erosion - deposition of the riverbed and the suspended sediment concentration nearby. The riverbed e- volution is predicted. The water - sediment condition of typical series years and large, moderate and low flow typical years are se- lected. The impact of Three Gorges Project and operation of upstream reservoirs are taken into consideration in the series years. The favorable location and suitable elevation of the water intake are recommended based on the calculation results. It shows that the change of erosion - deposition of riverbed is affected by the incoming water and sediment conditions and the local topography.